(29-11-2018 07:27)lemonfreak Wrote: how can I tag a live concert to visible set 1, set 2, and encore?

any idea?

(I using the LUMIN app with LINN)

I'm not sure if there is any other solution than using audio editing software to split the concert into the parts you want. There are many such to choose from - I use Twisted Wave on a Mac.
Typically you would cut sections as required and paste these to new files named and numbered appropriately, before adding them to your music library. I import the edited files to iTunes so I can add all the meta data I require and then compress them losslessly to ALAC. MinimServer is pointed to my iTunes media folder for playback.